PORTABLE VENTILATION CURTAIN FRAME

1 . A support for an air ventilation control curtain, comprising:

a foldable support rod comprising a plurality of rigid hollow rod sections that are movable with respect to each other;

a coupler for provisionally joining an axial end of one of the rod sections to an axial end of another one of the rod sections;

an attachment device slidably mounted on the support rod so as to be movable along a length of the support rod, the attachment device adapted for engaging with a roof plate of a mine roof; and

a curtain hanger disposed on the support rod for hanging an air ventilation control curtain from the support rod.

2 . The support according to claim 1 , wherein the coupler has a sleeve structure having an inner diameter which is larger than an outer diameter of the axial ends of the rod sections, so that the axial ends of the rod sections are removable inserted into the coupler in order to be joined together in axial alignment.

3 . The support according to claim 1 , wherein the curtain hanger is mounted on the attachment device, so as to be slidable along the length of the support rod.

4 . The support according to claim 2 , wherein the attachment device has an inner diameter which is larger than an outer diameter of the coupler, so that the attachment device is slidably movable over the coupler disposed on the support rod.

5 . The support according to claim 1 , further comprising a tensioned wire threaded through all of the hollow rigid rod sections, having one end secured to a first end of the support rod and another end secured to a second end of the support rod, so as to connect the rod sections to each other when the rod sections are not joined together by the coupler.

6 . An air ventilation control device comprising:

a foldable support rod comprising a plurality of rigid hollow rod sections that are movable with respect to each other;

a coupler for joining an axial end of one of the rod sections to an axial end of another one of the rod sections;

an attachment device slidably mounted on the support rod so as to be movable along a length of the support rod, the attachment device adapted for engaging with a roof plate of a mine roof;

an air ventilation control curtain; and

a curtain hanger disposed on the support rod for hanging the air ventilation control curtain from the support rod.

7 . The support according to claim 6 , wherein the coupler has a sleeve structure having an inner diameter which is larger than an outer diameter of the axial ends of the rod sections, so that the axial ends of the rod sections are removable inserted into the coupler to be joined together in axial alignment.

8 . The support according to claim 6 , wherein the curtain hanger is mounted on the attachment device, so as to be slidable along the length of the support rod.

9 . The support according to claim 7 , wherein the attachment device has an inner diameter which is larger than an outer diameter of the coupler, so that the attachment device is slidably movable over the coupler disposed on the support rod.

10 . A method of assembling a support for an air ventilation control curtain, comprising:

unfolding a support rod having a plurality of rigid hollow rod sections that are movable with respect to each other from a folded condition to an unfolded condition;

axially aligning and coupling the rod sections together in series;

sliding a plurality of attachment devices along the support rod so that the attachments devices are respectively aligned with and disposed under a plurality of roof plates on a mine roof;

securing the attachment devices to the roof plates; and

hanging an air ventilation control curtain from the support rod.